Dilute acid pretreatment, enzymatic saccharification and fermentation of elephantgrass and sudangrass to ethanol
In order to evaluate ethanol production potential of elephantgrass, sudangrass and their combined material, dilute-acid pretreatment, enzymatic hydrolysis, and fermentation of the biomasses,were investigated in the study. Ground biomasses at a solid loading of 12.5％(w/v) were pretreated with H2SO4 at concentration of 0.5％, 1％, 1.5％(w/v), and enzymatic hydrolysis was performed using commercial cellulose, and fermentation was investigated with Candida tropicalis and S. cerevisiae. Monomeric sugars, lignin and ash content in the prehydrolyzate, and ethanol yields were analyzed in the experiment. The yield of xylose from the hydrolyzate was between 56.96-100.34mg g-1. The glucose concentration in the prehydrolyzate was 21.31-57.46mg g-1 and the maxim yield of total sugars in elephantgrass and sudangrass was 141.73 and 124.177 mg g-1 respectively. And the release of sugars after enzymatic hydrolysis was 139.15-195.94mg g-1. The ethanol yield per unit biomass was comparable to those reported from other agriculture biomass: 0.09-0.12g g dry-1.The mixture biomass gave a 16.36％ higher ethanol yield than others. The results suggested that the two species are suitable for ethanol production. And the combination ofsudangrass with elephantgrass had a positive effect on the ethanol yield.
dilute-acid pretreatment enzyme hydrolysis ethanol production sudangrass elephantgrass, Separate hydrolyseand fermentation (SHF)
Yunchen Zhao Zui Yu Jianlong Li Haixia Huang Juan Fan Hong Zhou
state key laboratory of pharmaceutical biotechnology,School of life science,Nanjing University,Nanji state key laboratory of pharmaceutical biotechnology,School of life science,Nanjing University,Nanji
国际会议
广州
英文
803-806
2008-12-03（万方平台首次上网日期，不代表论文的发表时间）